Packing for oil-wells.



,1.\I0.790,208.v l PATBNTED MAY 16', 1905.

' A. J. HUBBARD.

PACKING FOR OIL WELLS.

APPLICATION FILED HAY 12, 1904..

2 sums-snm 1.

No. 790,208) y PATENTED MAY 16, 1905.

A. J. HUBBARD.

PACKING 'POR OIL WELLS. APPLIoATIoN FILED MAY 12, 1904.

2 SHEETS-SHEET 2.

AAAAAAAAAA l UNITED STATES Patented May 16,1905.y i'

PATE1\rr OFFICE'.

PAQKING For# olL-wELLs.

SPECIFICATION forming para of LettersPatent No. 790,208, dated May 16, 1905. Appleman filed May Y1Q, 1904. serial No. 207,430.

To a/ZZ whom it may concern/f '-"1- Be it known thatI, AIRWINE J. HUBBA'R'D, a citizen of the United States, residing at Warren, in the county of Warren and State of'Pennsy'lvania, have invented a new andluseful Im` provement in Packing forOil-Wells', of 'which the following is a specification'.

This invention relates generally tooil-wells, and more particularly to' animprovedlconstruction of packing usedy in said wellsfr the purpose of vclosingy lateral openings or `fissures leading into'the well proper.

In boring oil or Artesian wells itlfrequently happens that a lateral stream enters the well proper or a stratum of soft rock or other material is struck, which has a tendency to cave in and fill up the well proper. Various forms of packingV devices have been employed for closing these lateral openings; but all of said devices are more or less objectionable; and the object of my invention is to provide` an exceedingly cheap, simple, and eiiicient form of packing which will overcome all of the objectionable features of the packings now in use; and with these objects in view my invention consists, broadly, in the `employment of an elastic sleeve having an expansible sectional sleeve arranged therein, which sectional expansible sleeve is adapted to be expanded at the proper time, and said expansible sleeve is provided with means which automatically lock the said sections in their expanded positions, thereby securely holding the elastic sleeve in contact with the side walls of the well for the purpose of closing the openings.

The invention consists also in certain details of construction and novelties of combination, all of which will be fully described hereinafter and pointed out in the claims.

In the drawings forminga part of this specification, Figure 1 is a sectional elevation of a packing constructed in accordance with my? invention. Fig. 2 is a vertical sectional view of the same. Fig. 8 is a horizontal section on the line 3 3 of Fig. 2. Fig. 4 is a horizontal section on the line 4 4 of Fig. 2. Fig. 5 is a horizontal section on the line 5 5 of Fig. 2.

Fig. 6 is a detail perspective view of the top coupling. Fig. 7 is a detail perspective view of the bottom coupling. Figs. 8 and 9 are Idetailyiews of the sections of the expanding sleeve. `Fig. 10 shows an edge view of one of the sections; yiew of said edge. Fig. l2 is a detail perspective view of one of the wedges.

In'the practical embodiment of 4my inventionv I employ an elastic sleeve A, preferably inadeof rubber, and within this elastic sleeve il arrange asectional expansible sleeve B, com- .'posed of two longitudinal sections B', threaded internally throughout its entire length, as shown at B2. When the sections are inserted iu the elastic sleeve, their vertical edges contact and the said sleeve is a perfect cylinder. The opposing edges are formed withtapering Fig. 11 shows the sectionalrecesses B, in which are located Wedge-shaped keys C, said wedge-shaped keys being of such size and shape that they [it within the tapering recesses and permit the sections of the sleeve to join and form a perfect cylinder, as most clearly shown in Figs. 4 and 5. Extending through the sleeve B is the tubing D, having an'external threaded expander E at its lower end, said expander E being slightly larger at its lower end than at its upper end, and the threads are cut upon the same pitch as the internal threads of the sectional sleeve, so that by turning the tubing the expander can be drawn up in to the sleeve for the purpose of expanding the same, and consequently expanding the elastic sleeve, so as to bring it into contact with the side walls of the well.

The sleeve-sections are each provided with T-shaped slots B4t at their upper and lower ends, which slots are adapted to receive the IT-shaped lugs F and Gr', carried by the top tom shell has a plurality of spring-arms LA connected thereto for the purpose of steadying the device as it is lowered into the well, and each spring-arm carries `an edged wheel M, which is adapted to engage the side walls ofA the well and prevent the device turning when the tubing is turned for the purpose of drawing the expander up between thesleeve.-v sections.

In operation the packing constructed as herein shown and described is lowered into the well the proper distance, and then by turning the tubing to the right the threaded expander is drawn up into the sectional sleeve, and thereby expands said sections, which in turn expand the elastic sleeve and ybringit into contact with the side walls of the well and close the lateralopenings. As the expander is drawn up between the sleeve-sections and said sections separated the wedges held in the tapered recesses drop down and lock theseparated sections in that position, thereb;7 preventing the parts contracting after, 1theexpander has been removed.y

It'willthus be seen'that I provide. an ex- .-ceedingly cheap .and simple form. of -'well;

sleeve, a sectional expanding sleeve threaded internally, anA externally-threaded expander, a wedge arranged between the sectionsof the expanding sleeve, and shells connected to the top and bottom of the expanding sleeve.

3. In an oil-well packer, the combination with anexpansible sectionalsleeve, and of top and bottom couplings detachably connected thereto.

4. The combination with sleeve sections having their opposing edges recessed, of wedges arranged in said recesses, and top and bottom couplings connected to the sections.

5. The combination with top and bottom shells, of top and bottom couplings, a longitudinally-divided sleeve adapted to be engaged by the, eouplingsthe meeting edges ofithe sections being` recessed, wedges `held in-.said.

recesses, an. elastic sleeve adapted Ato litover` thesectional sleeve, a tubing passing through the sectional sleeve,fand an1expander earned by the tubing, as and for the purpose set forth.

6.. The combination-withsleeve-sections recessed as described and provided with Tv shaped slots at the upper and lower ends` of top andbottomcouplings each `having va .T'.-

O. C. ALLEN, R. H. DAvis. 

